Thank you for this post. I have been trying to solve a similar problem with my 2017 Macbook pro 13” touch bar, which was warming up in the palm rest and keyboard area. All diagnostics came out fine but still, I was having a hard time typing due to heat building. Finally TG pro showed that two thunderbolts are hot as the processor. This is strange but reasonable as two dongles were attached to connect 2nd display and wireless mouse. Disconnected the two dongles and temperature went back to normal in 5 min! Can’t blame apple too much, but certainly not the best experience.